Bucket-securing means for turbines.



PATENTED JAN. 21, 1908.

O.JUNGGREN. BUCKET SECURING MEANS FDR TURBINES.

APPLIOATION FILED JULY 25.1906.

Witnesses:

05 Car L/unggr'en,

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UNITED STATES PATENT OFFICE.

OSOAR'JUNGGREN, OF SOHENECTAIJY, NEW YORK, ASSIGNOR TO GENERAL ELECTRIC COMPANY, A CORPORATION OF ,NEW YORK.

BUCKET-SECURING MEANS FOR'TURBINES.

Specification of Letters Patent.

Patented Jan. 21, 1908.

Application filed July 25. 1906- Serial m5. 327597.

' citizen :ofthe United States, residing at Schenectady, county of Schenectady, State of New York, have invented certain new and useful Improvements in Bucket-Securing Means for ElasticFluid Turbines, of which the following isa specification.

. This inventionrelates to elastic fluid turbines, and especially to the mode of securing s'e arately formed buckets to the bucketw eel. v

. In carrying out my invention, I provide separately formed buckets, preferably made of extruded metal cut to the proper lengths and provided with shanks having suitable shoulders to engage in undercut grooves formed in bases or other supports. It is preferred to make these bases in segments and secure them to the rim of the wheel; each so ment carrying its set of buckets, suitably he d apart by spacing blocks, and secured by fastening the end blocks. On the wheel and on the base se ments are shoulders which cooperate with 'c amping rings suitably secured to the wheel.-

The. details of construction and the features of novelty in my invention will be hereinafter set forth, and particularly pointed out in the appended claims.

In the accompanying drawing, Figure 1 is a radial cross-section of a portion of a bucket wheel, base segment and clamping rings;

Fig. 2 is a similar view of a modified cons'truction; Fi 3 is a side elevation, partly in section; and ig. 4; is a sectional plan or edge The buckets 1 are crescent or lune-shaped in cross-section, being formed preferably of extruded metal, cut into suitable lengths. At one end is provided a shank 2 having. shoulders 3 to engage in undercut grooves formed longitudinally in the base-segments or other supports4. Between the'shanks 2 are interposed spacing blocks 5, and filling blocks-.6 are put at the ends, so that the riphery is preferably smooth as shown. In order to secure the-segments in place, I revide on each side of'sald segments a shou der 10, the shoulders: on all the segments being in line and concentric with the axis of the wheel. Near the rim of the wheel on each side is'formed a shoulder 11 concentric with the axis of the wheel.

In Fig. 1', the shoulders 10', 11 are formed by cutting grooves in'the base-segments and the wheel; while in Fig. 2 the shoulders are formed by dee uarrowilanges on these two parts. Two 0 amping rings 12 have flanges 13 which engage with the shoulders 10, 11 and are retained in place by rivets 14 passing through the rings and passages in the wheel,

and having their heads countersunkflushwith the outer ,face of said rings. The passages in the wheel may be holes, as shown in Fig. ;1, or notches 15 in the-rim of the wheel, as shown in Figs. 2 and 3, as maybe found most desirable. The clamping rings may be continuous; or made in segments, as indicated in Figs. 3 and 4. The segmental construction is preferable for large wheels, and.

also facilitates removal when repairs arenecessary.' I

It will be seen that by having the shanks 2 substantially in the middle of thebase segments, and placing a clamping ring on each side of the wheel the centrifugal strains are evenly distributed and cannot tend to warp the buckets out of their plane of revolution.

The construction is simple but strong: the parts are all held rigidly together, and yet any defective bucket can be readily removed Without dismantling the whole wheel.

In accordance with the provisions of the patent statutes, I have described the principle of operation of my invention, together with the apparatus which I now consider'to represent the best imbodiment'thereof; but

I desire to have it understood that the apparatus'shown is only illustrative, and that the invention can be carried out by other means. What I claim as new and desire to secure by Letters Patent of the United States, is:

1. Inan elastic fluid turbine, the cdmbina' tion with a wheel,' of base segments fitted thereto, buckets anchored in the segments, shoulders on each side of said wheel and segments, flanged rings engaging with said shoulders, and rlvets rings andwheel.

2. In an elastic fluid turbine, the combinapassing through said said wheel.

3. In an elastic fluid turbine, the combination with a wheel having a smooth periphery and concentric shoulders on its sides, 0 base segments fitted to said periphery, provided with longitudinal undercut grooves and having concentric shoulders on each side, separately formed buckets having shanks engaging in said grooves, spacing blocks between them, segmental clamping rings having flanges engaging with said shoulders on the base segments and Wheel, and rivets passing through said rings andwheel.

In witness whereof I have hereunto set my hand this 23d day of July, 1906.

. OSCAR JUNGG'R-EN. Witnesses;

BENJAMIN B. HULL, FRANK J. DORE.-

.i. I I; 

